Service Information

Captiva

DTC C0393

Diagnostic Instructions

•	Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

•	Review Strategy Based Diagnosis for an overview of the diagnostic approach.

•	Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C0393 06: Rear Axle Coupling Solenoid Control Circuit Short to Ground or Open/High Resistance

DTC C0393 0B: Rear Axle Coupling Solenoid Control Circuit Current Above Threshold

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
High Clutch Solenoid Control	C0393 06	C0393 06	C0393 0B	-
Low Clutch Solenoid Control	C0393 06	C0393 06	C0393 0B	-

The rear differential clutch control module (CCM) provides a power and ground switching circuits to the solenoid. The solenoid receives current from the CCM through PWM low side driver, and converts that signal into torque through the clutch to the rear tyres when all wheel drive (AWD) is requested.

Conditions for Running the DTC

•	The ignition is ON.

•	Ignition voltage is greater than 9 volts.

Conditions for Setting the DTC

C0393 06

An open or short to ground is detected on the high or low solenoid circuits.

C0393 0B

A short to voltage is detected on the high or low solenoid circuits.

Action Taken When the DTC Sets

All wheel drive indicator illuminates.

Conditions for Clearing the DTC

•	The condition for the DTC is no longer present.

•	The DTC is not detected in 40 consecutive drive cycles.

Reference Information

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

Ignition OFF, disconnect the wiring harness plug X2 at the rear differential clutch control module.
Ignition ON, verify a test lamp does not illuminate between the control circuit terminals listed below and ground:

•	Terminal 5

•	Terminal 3

⇒	If the test lamp illuminates, test the appropriate control circuit for a short to voltage.

Ignition OFF, test for infinite resistance between the control circuit terminals listed below and ground:

•	Terminal 5

•	Terminal 3

⇒	If less than the specified value, test the appropriate control circuit for a short to ground.

Test for less than 5 ohms between the control circuit terminal 5 and control circuit terminal 3.

⇒	If greater than the specified range, test both control circuits for an open/high resistance. If the circuits test normal, replace the differential rear wheel drive module clutch housing solenoid.

If all circuits test normal, replace the CCM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•	Rear Wheel Drive Module Clutch Housing Replacement

•	Control Module References for CCM replacement, setup, and programming